OpenGpioPinFd.c

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#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>

#include "../Sysfs/Sysfs.h"

int OpenGpioPinFd( int Pin )
 {
 GpioExport(Pin);
 SetGpioAsOutput(Pin);

 snprintf(path, DIRECTION_MAX, "/sys/class/gpio/gpio%d/value", Pin);
 GpioPinFd = open( path, O_WRONLY | O_SYNC );
 if (GpioPinFd == -1) 
  {
  fprintf(stderr, "201309202358 Failed to open gpio pin %i for writing, are you root?\n", Pin);
  exit(-1);
  }

 return(GpioPinFd);
 }